618387213376 has 21 divisors (see below), whose sum is σ = 1227124610389. Its totient is φ = 309190461184.

The previous prime is 618387213343. The next prime is 618387213443. The reversal of 618387213376 is 673312783816.

It is a happy number.

The square root of 618387213376 is 786376.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 68748840000 + 549638373376 = 262200^2 + 741376^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6241860 + ... + 6340156.

Almost surely, 2^618387213376 is an apocalyptic number.

618387213376 is the 786376-th square number.

It is an amenable number.

618387213376 is a deficient number, since it is larger than the sum of its proper divisors (608737397013).

618387213376 is an frugal number, since it uses more digits than its factorization.

618387213376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196606 (or 98299 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 55.

The spelling of 618387213376 in words is "six hundred eighteen billion, three hundred eighty-seven million, two hundred thirteen thousand, three hundred seventy-six".